Module: Textus::Ports::Fetch::Detached

Defined in:
lib/textus/ports/fetch/detached.rb

Class Method Summary collapse

Class Method Details

.acting_role(store) ⇒ Object 



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# File 'lib/textus/ports/fetch/detached.rb', line 11

def acting_role(store)
  store.manifest.policy.actor_for("fetch")
end

.spawn(store_root:, key:) ⇒ Object 



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# File 'lib/textus/ports/fetch/detached.rb', line 15

def spawn(store_root:, key:)
  return nil unless supported?

  pid = Process.fork do
    $stdin.close
    $stdout.reopen(File::NULL, "w")
    $stderr.reopen(File::NULL, "w")

    lock = Textus::Ports::Fetch::Lock.new(root: store_root, key: key)
    exit(0) unless lock.try_acquire

    begin
      store = Textus::Store.new(store_root)
      # No fetch-holder configured — exit the child cleanly. In practice
      # this is unreachable: the background fork only happens after a
      # foreground fetch was already authorized (so a fetch-holder
      # exists). Config-time detection is doctor's job (ADR 0044 Q2).
      role = acting_role(store)
      exit(0) unless role
      store.as(role).fetch(key)
    rescue StandardError
      # Already logged via :fetch_failed; exit cleanly.
    ensure
      lock.release
      exit(0)
    end
  end
  Process.detach(pid)
  pid
end

.supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/textus/ports/fetch/detached.rb', line 7

def supported?
  Process.respond_to?(:fork)
end